Blackpowder Products The Claw Shotgun Sling with Sling Swivel Studs (Mossy Oak Duckblind Camo) The Claw Shotgun Sling for Automatic and Pump Shotguns incorporates the same advanced design, quality control and handling/maintenance features found in our Claw Rifle Slings. There is no need to worry about swivels and swivel stud attachments. The Claw Shotgun Sling is designed with sling swivel studs. It is fully adjustable.